The Scenario
You are a backend developer on a team with eight feature branches sitting in the queue for review. Each branch has pending migrations. Before anything merges to main, you need to confirm that the schema on each feature branch differs from main only in the expected ways.
The branch pair list is already in a Google Sheet: column A has the project ID, column B has the feature branch ID, column C has the main branch ID. You need the diff for each pair in column D before tomorrow's architecture review at 10 AM.
The bad version of the next two hours:
- Connect to feature branch one with psql
- Dump the schema
- Connect to main, dump that schema
- Run a diff manually between the two outputs
- Read the diff, paste the relevant lines into the sheet
- Close both connections, connect to feature branch two
- Repeat seven more times
- Realize branch five has an unexpected index that nobody documented
- You walk into the architecture review with three branches unreviewed and no explanation for branch five.
The fast version is one prompt.
The Easy Way: One Prompt in SheetXAI
SheetXAI reads the branch pair list from your sheet and calls the Neon API to compare schemas for each pair, so you never run manual diffs or copy terminal output into cells.
Open the SheetXAI sidebar and type:
For each row in my sheet with a project_id in column A, source branch_id in column B, and target branch_id in column C, compare the database schemas using Neon and write the unified diff into column D.
SheetXAI iterates through all eight rows, calls the Neon schema comparison API for each pair, and writes the diff output into column D. All eight comparisons are done before the architecture review.
What You Get
A complete pre-merge schema review sheet with:
- Column D — the unified diff for each feature-to-main branch pair
- Identical format across all rows — same output structure, easy to scan for unexpected changes
- Traceability — each diff is tied to the exact project ID and branch IDs that produced it
Branches where the schema is identical get an explicit "no differences" entry in column D so the team knows the comparison ran, not that it was skipped.
What If the Data Is Not Quite Ready
Schema diff sheets often need additional filtering or formatting before they are useful in a review. SheetXAI applies the logic in the same prompt.
When you want a YES/NO flag alongside the full diff
The project manager does not want to read raw diffs. They want a quick column that shows whether there are differences at all.
Compare schemas between the branch pairs listed in my sheet and write whether there are any schema differences (YES/NO) in column D and the full diff text in column E for each pair.
When some rows are missing the target branch ID
A few rows only have the feature branch ID in column B. You want to compare against the project's default main branch automatically.
For any row where column C is blank, look up the default branch ID for the project in column A and use that as the comparison target. Then compare schemas for all rows and write the diff into column D.
When you want to flag only rows with unexpected changes
You expect most branches to have exactly one new table and nothing else. You want to flag any diff that adds more than that.
Compare schemas for all rows. In column E, write 'REVIEW' for any diff that shows more than one new table or any deleted or altered columns. For the rest, write 'OK'.
When the review sheet needs an executive summary for the architecture meeting
The team lead wants a summary cell they can screenshot, not just a row of diffs.
Compare schemas between all branch pairs in my sheet and write the unified diff into column D and YES/NO into column E. Then write a summary into cell G1 listing: total branches reviewed, number with differences, number with unexpected changes (more than one new object), and the branch IDs that need a closer look.
The pattern: describe the full review output you need in one prompt. SheetXAI builds the comparison table and the summary from the Neon API.
Try It
Get the 7-day free trial of SheetXAI and open any sheet with Neon branch pair IDs, then ask it to compare the schemas. The Neon integration is included in every plan. For related documentation workflows, see how to export Neon branch schemas to a sheet or the Neon in Google Sheets overview.